[analyzer] Fix a merge error in -analyzer-config tests.
It was introduced when two -analyzer-config options were added almost
simultaneously in r324793 and r324668 and the option count was not
rebased correctly in the tests.
Fixes the buildbots.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@324801 91177308-0d34-0410-b5e6-96231b3b80d8